366 lines
11 KiB
LLVM
366 lines
11 KiB
LLVM
; Test the static branch probability heuristics for no-return functions.
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; RUN: opt < %s -analyze -branch-prob | FileCheck %s
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declare void @g1()
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declare void @g2()
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declare void @g3()
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declare void @g4()
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define void @test1(i32 %a, i32 %b) {
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entry:
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br label %do.body
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; CHECK: edge entry -> do.body probability is 16 / 16 = 100%
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do.body:
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%i.0 = phi i32 [ 0, %entry ], [ %inc3, %do.end ]
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call void @g1()
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br label %do.body1
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; CHECK: edge do.body -> do.body1 probability is 124 / 124 = 100%
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do.body1:
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%j.0 = phi i32 [ 0, %do.body ], [ %inc, %do.body1 ]
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call void @g2()
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%inc = add nsw i32 %j.0, 1
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%cmp = icmp slt i32 %inc, %b
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br i1 %cmp, label %do.body1, label %do.end
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; CHECK: edge do.body1 -> do.body1 probability is 124 / 128
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; CHECK: edge do.body1 -> do.end probability is 4 / 128
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do.end:
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call void @g3()
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%inc3 = add nsw i32 %i.0, 1
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%cmp4 = icmp slt i32 %inc3, %a
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br i1 %cmp4, label %do.body, label %do.end5
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; CHECK: edge do.end -> do.body probability is 124 / 128
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; CHECK: edge do.end -> do.end5 probability is 4 / 128
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do.end5:
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call void @g4()
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ret void
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}
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define void @test2(i32 %a, i32 %b) {
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entry:
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%cmp9 = icmp sgt i32 %a, 0
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br i1 %cmp9, label %for.body.lr.ph, label %for.end6
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; CHECK: edge entry -> for.body.lr.ph probability is 20 / 32
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; CHECK: edge entry -> for.end6 probability is 12 / 32
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for.body.lr.ph:
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%cmp27 = icmp sgt i32 %b, 0
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br label %for.body
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; CHECK: edge for.body.lr.ph -> for.body probability is 16 / 16 = 100%
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for.body:
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%i.010 = phi i32 [ 0, %for.body.lr.ph ], [ %inc5, %for.end ]
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call void @g1()
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br i1 %cmp27, label %for.body3, label %for.end
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; CHECK: edge for.body -> for.body3 probability is 62 / 124 = 50%
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; CHECK: edge for.body -> for.end probability is 62 / 124 = 50%
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for.body3:
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%j.08 = phi i32 [ %inc, %for.body3 ], [ 0, %for.body ]
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call void @g2()
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%inc = add nsw i32 %j.08, 1
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%exitcond = icmp eq i32 %inc, %b
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br i1 %exitcond, label %for.end, label %for.body3
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; CHECK: edge for.body3 -> for.end probability is 4 / 128
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; CHECK: edge for.body3 -> for.body3 probability is 124 / 128
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for.end:
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call void @g3()
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%inc5 = add nsw i32 %i.010, 1
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%exitcond11 = icmp eq i32 %inc5, %a
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br i1 %exitcond11, label %for.end6, label %for.body
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; CHECK: edge for.end -> for.end6 probability is 4 / 128
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; CHECK: edge for.end -> for.body probability is 124 / 128
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for.end6:
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call void @g4()
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ret void
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}
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define void @test3(i32 %a, i32 %b, i32* %c) {
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entry:
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br label %do.body
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; CHECK: edge entry -> do.body probability is 16 / 16 = 100%
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do.body:
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%i.0 = phi i32 [ 0, %entry ], [ %inc4, %if.end ]
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call void @g1()
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%0 = load i32* %c, align 4
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%cmp = icmp slt i32 %0, 42
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br i1 %cmp, label %do.body1, label %if.end
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; CHECK: edge do.body -> do.body1 probability is 62 / 124 = 50%
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; CHECK: edge do.body -> if.end probability is 62 / 124 = 50%
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do.body1:
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%j.0 = phi i32 [ %inc, %do.body1 ], [ 0, %do.body ]
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call void @g2()
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%inc = add nsw i32 %j.0, 1
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%cmp2 = icmp slt i32 %inc, %b
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br i1 %cmp2, label %do.body1, label %if.end
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; CHECK: edge do.body1 -> do.body1 probability is 124 / 128
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; CHECK: edge do.body1 -> if.end probability is 4 / 128
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if.end:
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call void @g3()
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%inc4 = add nsw i32 %i.0, 1
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%cmp5 = icmp slt i32 %inc4, %a
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br i1 %cmp5, label %do.body, label %do.end6
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; CHECK: edge if.end -> do.body probability is 124 / 128
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; CHECK: edge if.end -> do.end6 probability is 4 / 128
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do.end6:
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call void @g4()
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ret void
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}
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define void @test4(i32 %a, i32 %b, i32* %c) {
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entry:
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br label %do.body
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; CHECK: edge entry -> do.body probability is 16 / 16 = 100%
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do.body:
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%i.0 = phi i32 [ 0, %entry ], [ %inc4, %do.end ]
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call void @g1()
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%0 = load i32* %c, align 4
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%cmp = icmp slt i32 %0, 42
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br i1 %cmp, label %return, label %do.body1
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; CHECK: edge do.body -> return probability is 4 / 128
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; CHECK: edge do.body -> do.body1 probability is 124 / 128
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do.body1:
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%j.0 = phi i32 [ %inc, %do.body1 ], [ 0, %do.body ]
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call void @g2()
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%inc = add nsw i32 %j.0, 1
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%cmp2 = icmp slt i32 %inc, %b
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br i1 %cmp2, label %do.body1, label %do.end
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; CHECK: edge do.body1 -> do.body1 probability is 124 / 128
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; CHECK: edge do.body1 -> do.end probability is 4 / 128
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do.end:
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call void @g3()
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%inc4 = add nsw i32 %i.0, 1
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%cmp5 = icmp slt i32 %inc4, %a
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br i1 %cmp5, label %do.body, label %do.end6
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; CHECK: edge do.end -> do.body probability is 124 / 128
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; CHECK: edge do.end -> do.end6 probability is 4 / 128
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do.end6:
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call void @g4()
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br label %return
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; CHECK: edge do.end6 -> return probability is 16 / 16 = 100%
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return:
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ret void
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}
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define void @test5(i32 %a, i32 %b, i32* %c) {
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entry:
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br label %do.body
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; CHECK: edge entry -> do.body probability is 16 / 16 = 100%
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do.body:
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%i.0 = phi i32 [ 0, %entry ], [ %inc4, %do.end ]
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call void @g1()
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br label %do.body1
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; CHECK: edge do.body -> do.body1 probability is 124 / 124 = 100%
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do.body1:
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%j.0 = phi i32 [ 0, %do.body ], [ %inc, %if.end ]
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%0 = load i32* %c, align 4
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%cmp = icmp slt i32 %0, 42
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br i1 %cmp, label %return, label %if.end
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; CHECK: edge do.body1 -> return probability is 4 / 128
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; CHECK: edge do.body1 -> if.end probability is 124 / 128
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if.end:
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call void @g2()
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%inc = add nsw i32 %j.0, 1
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%cmp2 = icmp slt i32 %inc, %b
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br i1 %cmp2, label %do.body1, label %do.end
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; CHECK: edge if.end -> do.body1 probability is 124 / 128
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; CHECK: edge if.end -> do.end probability is 4 / 128
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do.end:
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call void @g3()
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%inc4 = add nsw i32 %i.0, 1
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%cmp5 = icmp slt i32 %inc4, %a
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br i1 %cmp5, label %do.body, label %do.end6
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; CHECK: edge do.end -> do.body probability is 124 / 128
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; CHECK: edge do.end -> do.end6 probability is 4 / 128
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do.end6:
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call void @g4()
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br label %return
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; CHECK: edge do.end6 -> return probability is 16 / 16 = 100%
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return:
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ret void
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}
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define void @test6(i32 %a, i32 %b, i32* %c) {
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entry:
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br label %do.body
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; CHECK: edge entry -> do.body probability is 16 / 16 = 100%
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do.body:
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%i.0 = phi i32 [ 0, %entry ], [ %inc4, %do.end ]
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call void @g1()
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br label %do.body1
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; CHECK: edge do.body -> do.body1 probability is 124 / 124 = 100%
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do.body1:
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%j.0 = phi i32 [ 0, %do.body ], [ %inc, %do.cond ]
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call void @g2()
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%0 = load i32* %c, align 4
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%cmp = icmp slt i32 %0, 42
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br i1 %cmp, label %return, label %do.cond
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; CHECK: edge do.body1 -> return probability is 4 / 128
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; CHECK: edge do.body1 -> do.cond probability is 124 / 128
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do.cond:
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%inc = add nsw i32 %j.0, 1
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%cmp2 = icmp slt i32 %inc, %b
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br i1 %cmp2, label %do.body1, label %do.end
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; CHECK: edge do.cond -> do.body1 probability is 124 / 128
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; CHECK: edge do.cond -> do.end probability is 4 / 128
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do.end:
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call void @g3()
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%inc4 = add nsw i32 %i.0, 1
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%cmp5 = icmp slt i32 %inc4, %a
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br i1 %cmp5, label %do.body, label %do.end6
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; CHECK: edge do.end -> do.body probability is 124 / 128
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; CHECK: edge do.end -> do.end6 probability is 4 / 128
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do.end6:
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call void @g4()
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br label %return
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; CHECK: edge do.end6 -> return probability is 16 / 16 = 100%
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return:
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ret void
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}
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define void @test7(i32 %a, i32 %b, i32* %c) {
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entry:
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%cmp10 = icmp sgt i32 %a, 0
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br i1 %cmp10, label %for.body.lr.ph, label %for.end7
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; CHECK: edge entry -> for.body.lr.ph probability is 20 / 32
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; CHECK: edge entry -> for.end7 probability is 12 / 32
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for.body.lr.ph:
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%cmp38 = icmp sgt i32 %b, 0
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br label %for.body
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; CHECK: edge for.body.lr.ph -> for.body probability is 16 / 16 = 100%
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for.body:
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%i.011 = phi i32 [ 0, %for.body.lr.ph ], [ %inc6, %for.inc5 ]
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%0 = load i32* %c, align 4
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%cmp1 = icmp eq i32 %0, %i.011
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br i1 %cmp1, label %for.inc5, label %if.end
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; CHECK: edge for.body -> for.inc5 probability is 62 / 124 = 50%
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; CHECK: edge for.body -> if.end probability is 62 / 124 = 50%
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if.end:
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call void @g1()
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br i1 %cmp38, label %for.body4, label %for.end
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; CHECK: edge if.end -> for.body4 probability is 62 / 124 = 50%
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; CHECK: edge if.end -> for.end probability is 62 / 124 = 50%
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for.body4:
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%j.09 = phi i32 [ %inc, %for.body4 ], [ 0, %if.end ]
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call void @g2()
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%inc = add nsw i32 %j.09, 1
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%exitcond = icmp eq i32 %inc, %b
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br i1 %exitcond, label %for.end, label %for.body4
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; CHECK: edge for.body4 -> for.end probability is 4 / 128
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; CHECK: edge for.body4 -> for.body4 probability is 124 / 128
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for.end:
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call void @g3()
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br label %for.inc5
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; CHECK: edge for.end -> for.inc5 probability is 124 / 124 = 100%
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for.inc5:
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%inc6 = add nsw i32 %i.011, 1
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%exitcond12 = icmp eq i32 %inc6, %a
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br i1 %exitcond12, label %for.end7, label %for.body
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; CHECK: edge for.inc5 -> for.end7 probability is 4 / 128
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; CHECK: edge for.inc5 -> for.body probability is 124 / 128
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for.end7:
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call void @g4()
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ret void
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}
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define void @test8(i32 %a, i32 %b, i32* %c) {
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entry:
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%cmp18 = icmp sgt i32 %a, 0
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br i1 %cmp18, label %for.body.lr.ph, label %for.end15
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; CHECK: edge entry -> for.body.lr.ph probability is 20 / 32
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; CHECK: edge entry -> for.end15 probability is 12 / 32
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for.body.lr.ph:
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%cmp216 = icmp sgt i32 %b, 0
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%arrayidx5 = getelementptr inbounds i32* %c, i64 1
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%arrayidx9 = getelementptr inbounds i32* %c, i64 2
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br label %for.body
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; CHECK: edge for.body.lr.ph -> for.body probability is 16 / 16 = 100%
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for.body:
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%i.019 = phi i32 [ 0, %for.body.lr.ph ], [ %inc14, %for.end ]
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call void @g1()
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br i1 %cmp216, label %for.body3, label %for.end
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; CHECK: edge for.body -> for.body3 probability is 62 / 124 = 50%
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; CHECK: edge for.body -> for.end probability is 62 / 124 = 50%
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for.body3:
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%j.017 = phi i32 [ 0, %for.body ], [ %inc, %for.inc ]
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%0 = load i32* %c, align 4
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%cmp4 = icmp eq i32 %0, %j.017
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br i1 %cmp4, label %for.inc, label %if.end
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; CHECK: edge for.body3 -> for.inc probability is 62 / 124 = 50%
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; CHECK: edge for.body3 -> if.end probability is 62 / 124 = 50%
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if.end:
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%1 = load i32* %arrayidx5, align 4
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%cmp6 = icmp eq i32 %1, %j.017
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br i1 %cmp6, label %for.inc, label %if.end8
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; CHECK: edge if.end -> for.inc probability is 62 / 124 = 50%
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; CHECK: edge if.end -> if.end8 probability is 62 / 124 = 50%
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if.end8:
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%2 = load i32* %arrayidx9, align 4
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%cmp10 = icmp eq i32 %2, %j.017
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br i1 %cmp10, label %for.inc, label %if.end12
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; CHECK: edge if.end8 -> for.inc probability is 62 / 124 = 50%
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; CHECK: edge if.end8 -> if.end12 probability is 62 / 124 = 50%
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if.end12:
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call void @g2()
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br label %for.inc
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; CHECK: edge if.end12 -> for.inc probability is 124 / 124 = 100%
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for.inc:
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%inc = add nsw i32 %j.017, 1
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%exitcond = icmp eq i32 %inc, %b
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br i1 %exitcond, label %for.end, label %for.body3
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; CHECK: edge for.inc -> for.end probability is 4 / 128
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; CHECK: edge for.inc -> for.body3 probability is 124 / 128
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for.end:
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call void @g3()
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%inc14 = add nsw i32 %i.019, 1
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%exitcond20 = icmp eq i32 %inc14, %a
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br i1 %exitcond20, label %for.end15, label %for.body
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; CHECK: edge for.end -> for.end15 probability is 4 / 128
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; CHECK: edge for.end -> for.body probability is 124 / 128
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for.end15:
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call void @g4()
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ret void
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}
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